ZM+ is the evolution of the classic formula (ZMA). Indeed, ZM+ is a considerable source of zinc, magnesium, vitamin B6 (pyridoxine HCl).
XPN gives you more, including 5-HTP in its formula. 5-Hydroxytryptophan is a serotonin precursor for better sleep regulation with insomnia disorders.
Zinc is an essential element that contributes to the functioning of more than 300 enzymes inside the human body. In men, it contributes positively to the production of testosterone.
Magnesium is an essential element that helps calm the nervous system. A nervous system at rest during the phases of deep sleep allows the release of growth hormone.